Cylinder Works CW50012K01 OEM Style Cylinder Kit 2021-2023 Gas Gas MC 50 KTM 50 SX

Professional Grade Engine Restoration for 50cc Racers

When your young racer’s engine loses compression or suffers a top-end failure, you need a solution that returns the machine to peak performance without the wait times of a machine shop. The Cylinder Works CW50012K01 OEM Style Cylinder Kit is a precision-engineered OEM Replacement that allows you to swap your worn components for a fresh, bolt-on top end. Moto-House MX stocks these kits specifically because they offer a seamless installation process, ensuring your Gas Gas or KTM gets back to the track with factory-level reliability and power delivery.

Engineering excellence is at the core of this kit, featuring a nickel silicon carbide-plated cylinder that provides extreme wear resistance and superior heat dissipation. To ensure maximum Racing Performance, Cylinder Works pairs these cylinders with premium Vertex pistons, known for their low-friction skirts and high-silicon aluminum alloy construction. This combination reduces engine noise and extends the service life of the top end, even under the high-RPM demands of competitive 50cc racing. Made in the U.S.A., this kit is the gold standard for riders who refuse to compromise on quality.

Top Features: Cylinder Works CW50012K01

• Nickel Silicon Carbide Plating: Provides a durable, low-friction bore surface that outlasts standard factory sleeves.
• Matched Vertex Piston: Includes a precision-fit Vertex piston kit designed for optimal ring seal and performance.
• Direct Bolt-On Design: Engineered to fit perfectly without any machining or modifications to the engine cases.
• Complete Gasket Set: Comes with all necessary top-end gaskets and O-rings to ensure a leak-free seal upon assembly.
• OEM Appearance: The exterior casting is designed to match the factory look, maintaining a professional aesthetic for your race bike.

Expert Pro-Tip: When installing this kit on a 50cc machine, always double-check your ring end gap and ensure the arrow on the piston crown points toward the exhaust port to avoid catastrophic engine failure.

Fitment List

Year Range	Vehicle Brand	Vehicle Model & Size
2021 - 2023	Gas Gas	MC 50
2009 - 2023	KTM	50 SX / 50 SX Mini
2017 - 2023	Husqvarna	TC 50
2018 - 2019	Husqvarna	TC 50 Mini
2011 - 2014	KTM	50 SXS

Frequently Asked Questions

Q: Does this kit include the cylinder head?
A: No, this kit is designed to be used with your stock OEM cylinder head, though it includes the necessary head gaskets for installation.

Q: Is this an oversized bore or a standard replacement?
A: This is a 39.50mm standard (STD) bore kit, meaning it maintains the stock displacement and is legal for most stock-class racing associations.

Q: Do I need to re-jet my carburetor after installing this kit?
A: Since this is an OEM-spec replacement, your stock jetting should remain very close, though we always recommend checking your spark plug color after the first ride.

Recommended Pairings

• Maxima Castor 927 2-Stroke Premix Oil
• NGK Iridium Spark Plugs

Stop by our local Store Montverde, FL or lightning-fast shipping across the USA.

Moto-House MX – Choice of Champions – is located in Clermont/Montverde, FL. The Best Motocross/UTV & ATV Shop in Central Florida.